Excimer therapy, also known as excimer laser therapy or excimer light treatment, utilizes a focused beam of UVB light, specifically a 308 nm wavelength, to treat various skin conditions. It's a form of targeted phototherapy, meaning it delivers UV light only to the affected areas, minimizing exposure to healthy skin. This makes it particularly useful for localized skin conditions and difficult-to-reach areas. How it works: The 308 nm wavelength of UVB light is absorbed by skin cells, triggering a therapeutic response.